[FIXED] Read even numbered files in python

Issue

I have files named as file_1.txt,file_2.txt,file_3.txt ... till file_589.txt in a folder. I want to make a loop to read only the even numbered files and concatenate them. Concatenation is not the issue . How do we read the files ?

Solution

You can do it with the os module.

• Change your directory to the folder conatining the files using os.chdir().
• List all the files in that folder using os.listdir(). This will give names of files in a list.
• Iterate over that list and check if the filename ends with even number.

for i in os.listdir():
    if int(i.split('_')[-1].split('.')[0]) % 2 == 0:
        print(i)
        # You can open the file and Do your concatenation here.

If you need a one-liner:

even_files = [x for x in os.listdir() if int(x.split('_')[-1].split('.')[0])%2 == 0]

Answered By - Ram